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EP0538892A1 - Motor-Fluidverdichter - Google Patents

Motor-Fluidverdichter Download PDF

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Publication number
EP0538892A1
EP0538892A1 EP92118209A EP92118209A EP0538892A1 EP 0538892 A1 EP0538892 A1 EP 0538892A1 EP 92118209 A EP92118209 A EP 92118209A EP 92118209 A EP92118209 A EP 92118209A EP 0538892 A1 EP0538892 A1 EP 0538892A1
Authority
EP
European Patent Office
Prior art keywords
drive shaft
compressor
contact
rearward end
bearing means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92118209A
Other languages
English (en)
French (fr)
Other versions
EP0538892B1 (de
Inventor
Yuji Yoshii
Junichi Yabushita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanden Corp
Original Assignee
Sanden Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sanden Corp filed Critical Sanden Corp
Publication of EP0538892A1 publication Critical patent/EP0538892A1/de
Application granted granted Critical
Publication of EP0538892B1 publication Critical patent/EP0538892B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents

Definitions

  • This invention relates to a fluid compressor, and more particularly, to a motor driven fluid compressor having the compression and drive mechanisms within a hermetically sealed container.
  • Japanese Patent Application Publication No. 1-110891 discloses a compressor including a hermetically sealed housing which contains a compression mechanism, such as a scroll type fluid compression mechanism and a drive mechanism therein as shown In FIG. 1.
  • the compressor includes a hermetically sealed casing 1, drive shaft 2, fixed and orbiting scrolls 3 and 4.
  • the drive shaft 2 axially penetrates the center of inner block 5 and is rotatably at the center of inner block 5 by hearing 6.
  • the forward end of drive shaft 2 forms a balance weight 7.
  • a hole 8 is axially formed on the balance weight 7.
  • An annular projection 9 is formed on the rearward end surface of a circular end plate 10 of orbiting scroll 4 and is inserted within hole 8.
  • the bearing 11 is disposed along the circumference of the inner surface of hole 8 and support annular projection 9 within hole 8.
  • the space 12 is formed between the rearward end surface of balance weight 7 and the forward end surface of bearings 6.
  • the space 13 is formed between the rearward end surface of annular projection 9 and the bottom end surface of hole 8.
  • the annular projection 9 periodically moves forwardly and rearwardly within space 13, and the balance weight 7 periodically moves forwardly and rearwardly within spaces 12 and 13.
  • This periodic axial movement of balance weight 7 causes balance weight 7 to repeat the collision with bearings 6. Therefore, the friction between balance weight 7 and bearings 6 occurs, and balance weight 7 and bearings 6 abrades or breaks.
  • the friction between the rearward end surface of annular projection 9 and the bottom surface of hole 8 occurs, as a result, balance weight 7 and annular projection 9 abrades or breaks.
  • a compressor according to this invention includes a fixed and a orbiting scrolls disposed within a hermetically housing.
  • the fixed scroll includes an end plate from which a first wrap or spiral element extends into the interior of the housing.
  • the end plate of fixed scroll divides the housing into a discharge chamber and a suction chamber.
  • the first spiral element is located in suction chamber.
  • the orbiting scroll includes an end plate from which a second wrap or spiral element extends.
  • the first and second spiral elements interfit angular and radial offset to form a plurality of line contacts which define at least one pair of sealed off fluid pockets.
  • a drive mechanism includes a motor supported in the housing.
  • the drive mechanism is operatively connected to orbiting scroll to effect orbital motion thereof.
  • a rotation device prevents the rotation of orbital scroll during orbital motion so that the volume of the fluid pockets changes to compress the fluid in pockets inwardly from the outermost pocket towards the central pockets.
  • the compressed gas flows out of the central pocket through a channel in the end plate of the fixed scroll and into a discharge chamber.
  • the drive mechanism includes a drive shaft of which the both ends penetrates the center of an inner block and are supported at the center of inner block by bearings.
  • the drive shaft radially forms the projections being in contact with the forward and the rearward ends of the bearings.
  • the drive shaft radially forms projection being in contact with the forward end of bearing which supports the forward end of drive shaft in inner block.
  • the ring made of metal is set in drive shaft so as to be in contact ring with the rearward end of bearing which supports the forward end of drive shaft in inner block.
  • the drive shaft radially forms projection being in contact with forward end of the bearing which supports the rearward end of drive shaft in inner block.
  • the ring made of metal is set in drive shaft so as to be in contact ring with the hearing which supports the forward and of drive shaft in inner block.
  • the projection prevents drive shaft moving rearward, the ring prevents drive shaft moving forward.
  • the drive shaft radially forms projection being in contact with the forward end of bearing which supports the rearward end of drive shaft.
  • the ring made of metal is set in drive shaft so as to be in contact ring with the rearward end of bearing which supports the rearward end of drive shaft in inner block.
  • the projection prevents drive shaft moving rearward
  • the ring prevents drive shaft moving forward.
  • FIG.2 is a vertical longitudinal sectional view of a hermetically sealed scroll type compressor in accordance with a first embodiment of this invention.
  • FIG.4 is a vertical longitudinal sectional view of a hermetically sealed scroll type compressor in accordance with a third embodiment of this invention.
  • FIG.6 is a vertical longitudinal sectional view of a hermetically sealed scroll type compressor in accordance with a fifth embodiment of this invention.
  • FIG.7 is a vertical longitudinal sectional view of a hermetically sealed scroll type compressor in accordance with a sixth embodiment of this invention.
  • FIG.2 a hermetically sealed scroll type compressor in accordance with a first embodiment of the present invention is shown.
  • the left side of the figure will be referenced as the forward end or front of the compressor and the right side of the figure will be referenced as the rearward end or rear of the compressor.
  • the compressor includes hermetically sealed casing 10, fixed and orbiting scrolls 20 and 30, and motor 40.
  • Fixed scroll 20 includes circular end plate 21 and spiral element or wrap 22 extending from rearward end surface thereof.
  • Fixed scroll 20 is fixedly disposed within a front end portion of casing 10 by a plurality of screws 23.
  • Circular end plate 21 of fixed scroll 20 partitions an inner chamber of casing 10 into discharge chamber 50 and suction chamber 60.
  • Orbiting scroll 30 is disposed within suction chamber 60, and includes circular end plate 31 and spiral element or wrap 32 extending from forward end surface of circular end plate 31.
  • Spiral element 22 of fixed scroll 20 and spiral element 32 of orbiting scroll 30 interfit at an angular and radial offset to form a plurality of linear contacts which define at least one pair of sealed off fluid pockets 70.
  • Annular projection 33 is formed at the rearward end surface of circular, end plate 31 opposite spiral element 32.
  • Rotation prevention device 34 is disposed on circumferential surface of annular projection 33 to prevent rotation of orbiting scroll 30 during orbital motion of orbiting scroll 30.
  • First and second inner blocks 11 and 12 secure stator 41 of motor 40 and are fixedly disposed near opposite ends within suction chamber 60.
  • Drive shaft 13 axially penetrates the centers of inner blocks 11 and 12. Both ends of drive shaft 13 are rotatably supported by inner blocks 11 and 12 through bearings 14 and 15, respectively.
  • Motor 40 includes stator 41 and rotor 42 which is fixedly secured to an exterior surface of drive shaft 13.
  • Pin member 16 is integral with and axially projects from the forward end surface of drive shaft 13 and is radially offset from the axis of drive shaft 13.
  • Balance weight 17 is disposed within a hollow space 61 defined by inner block 11 and the circular end plate 31 of orbiting scroll 30, and is fixedly connected to pin member 16.
  • Drive shaft 13 is provided with axial bore 81 and a plurality of radial bores 82.
  • Axial bore 81 extends from an opening at rearward end of drive shaft 13, that is, the end opposite pin member 16, to a closed end rearward of pin member 16.
  • Narrow passage 83 links the forward closed end of axial bore 81 to an open end surface of pin member 16 adjacent orbiting scroll 30.
  • the plurality of radial bores 82 link axial bore 81 near its closed end to cavity 62 located between motor 40 and hearing 14.
  • Suction gas inlet pipe 84 is inserted through the rearward end of casing 10 and faces the opening of axial bore 81.
  • Discharge gas outlet pipe attached to a side wall of casing 10 and links discharge chamber 50 to an external element.
  • stator 41 In operation, stator 41 generates a magnetic field causing rotation of rotor 42, thereby rotating drive shaft 13. This rotation is connected to orbital motion of orbiting scroll 30 through balance weight 17. Rotational motion of orbiting scroll 30 is prevented by rotation prevention drive 34.
  • Refrigerant gas introduced into suction chamber 60 through suction gas inlet pipe 84 is taken into the outer sealed fluid pockets 70 between fixed scroll 20 and orbiting scroll 30, and moves inwardly towards the center of spiral elements 22 and 32 due to the orbital motion of orbiting scroll 30. As the refrigerant moves towards the central pockets, it undergoes a resultant volume reduction and compressor, and is discharged to discharge chamber 50 through valved discharge port 24. Discharge gas in discharge chamber 50 then flows to an external fluid circuit (not shown) through discharge gas outlet pipe 85.
  • the preventing mechanism for preventing the axial movement of drive shaft 13 of this embodiment operates as follows.
  • the pressure of refrigerant gas within fluid pockets 70 causes the vibration within compressor.
  • the vibrations caused out of compressor such as the mechanical vibration caused within the automobile engine room, and like, propagate the inside of compressor.
  • FIG.3 a hermetically sealed scroll type compressor in accordance with a second embodiment of the present invention is shown.
  • the same construction is accorded like numerals as shown with respect to FIG.2 and the explanation of part of the identical elements is substantially omitted.
  • Ring 91 made of metal is set in the circumference of the forward end of drive shaft 13. Projection 131 is in contact with the rearward end of inner race 141 of bearing 14, and ring 91 is in contact with the forward end of inner race 141 of bearing 14.
  • Radial projection 133 radially extends from the exterior surface of the forward end of drive shaft 13. Ring 92 made of metal is set in the circumference of the forward end of drive end of drive shaft 13. Projection 133 is in contact with the forward end of inner race 141 of bearing 14, and ring 92 is in contact with the rearward end of inner race 141 of bearing 14.
  • FIG.6 a hermetically sealed scroll type compressor in accordance with a fifth embodiment of the present invention is shown.
  • the same construction is accorded like numerals as shown with respect to FIG.2 and the explanation of part of the identical elements is substantially omitted.
  • Ring 92 is in contact with the rearward end of inner race 141 of bearing 14, and the side surface of annular ridge 132 is in contact with the forward end of inner race 151 of bearing 15.
  • annular ridge 132 is in contact with the forward end of inner race 151 of bearing 15, and ring 132 is in contact rearward end of inner race 151 of bearing 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
EP92118209A 1991-10-24 1992-10-23 Motor-Fluidverdichter Expired - Lifetime EP0538892B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3278060A JPH05113187A (ja) 1991-10-24 1991-10-24 圧縮機
JP278060/91 1991-10-24

Publications (2)

Publication Number Publication Date
EP0538892A1 true EP0538892A1 (de) 1993-04-28
EP0538892B1 EP0538892B1 (de) 1995-12-20

Family

ID=17592099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92118209A Expired - Lifetime EP0538892B1 (de) 1991-10-24 1992-10-23 Motor-Fluidverdichter

Country Status (6)

Country Link
EP (1) EP0538892B1 (de)
JP (1) JPH05113187A (de)
KR (1) KR100193913B1 (de)
AU (1) AU649361B2 (de)
CA (1) CA2081434A1 (de)
DE (1) DE69206952T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505595A (en) * 1993-12-20 1996-04-09 Sanden Corporation Scroll type fluid displacement apparatus having axial movement regulation of the driving mechanism
US6129455A (en) * 1998-11-10 2000-10-10 Ford Motor Company Bearing assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100447206B1 (ko) * 2002-08-27 2004-09-04 엘지전자 주식회사 아우터 로터형 전동기가 구비된 스크롤 압축기

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283045A2 (de) * 1987-03-20 1988-09-21 Sanden Corporation Spiralkompresseur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4960238A (en) * 1989-04-18 1990-10-02 Macmillan Bloedel Containers 2-piece pizza box with cut-out corners
JP3078369B2 (ja) * 1991-10-24 2000-08-21 サンデン株式会社 圧縮機
JPH05113188A (ja) * 1991-10-24 1993-05-07 Sanden Corp 密閉形電動圧縮機

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0283045A2 (de) * 1987-03-20 1988-09-21 Sanden Corporation Spiralkompresseur

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 333 (M-534)(2389) 12 November 1986 & JP-A-61 138 895 ( SHIN MEIWA IND. CO. LTD. ) 26 June 1986 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 1 (M-550)(2448) 6 January 1987 & JP-A-61 182 482 ( SHIN MEIWA IND. CO. LTD. ) 15 August 1986 *
PATENT ABSTRACTS OF JAPAN vol. 11, no. 347 (M-641)(2794) 13 November 1987 & JP-A-62 126 284 ( DAIKIN IND. LTD. ) 8 June 1987 *
PATENT ABSTRACTS OF JAPAN vol. 14, no. 71 (M-933)(4014) 9 February 1990 & JP-A-01 290 983 ( DIESEL KIKI CO. LTD. ) 22 November 1989 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5505595A (en) * 1993-12-20 1996-04-09 Sanden Corporation Scroll type fluid displacement apparatus having axial movement regulation of the driving mechanism
US6129455A (en) * 1998-11-10 2000-10-10 Ford Motor Company Bearing assembly

Also Published As

Publication number Publication date
AU649361B2 (en) 1994-05-19
EP0538892B1 (de) 1995-12-20
KR930008304A (ko) 1993-05-21
JPH05113187A (ja) 1993-05-07
CA2081434A1 (en) 1993-04-25
DE69206952T2 (de) 1996-07-11
AU2735192A (en) 1993-04-29
KR100193913B1 (ko) 1999-06-15
DE69206952D1 (de) 1996-02-01

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